Blend door actuator motor has no power and AC quit same time

Asked by Mar 24, 2017 at 10:30 PM about the 1999 Ford F-150 XLT Extended Cab Stepside SB

Question type: Maintenance & Repair

My account quit checked all good but no
power,and no power to blend door actuator replace
it with new one still nothing, fuses good

2 Answers

340

If all of the door lock switches are functional but one door fails to operate, the most likely problem is an open circuit in the circuit between the switch and solenoid or a defective solenoid in the affected door. You should listen to the affected door while energizing the door lock. If a click is heard but the lock did not engage, a problem with the door lock mechanism or linkage is the most likely cause.

24,520

Use a multi-meter and check for voltage inside the fuse box where the fuse prongs make contact with the receptacle to ensure there is not a problem inside the box. If voltage is present you will have to trace the wire for voltage interruption to determine the cause. This is where a color coded wiring diagram for you vehicle comes in real handy.

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